WPR11CA336

NTSB accident investigation · Stearman C3-B · Spokane, WA · July 16, 2011

Accident · No injuriesData collectionFinal report
Date
July 16, 2011, 15:00 local (22:00 UTC)
Place
Spokane, WA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N3440Stearman C3-B
Defining event
Landing-flare/touchdown: Abnormal runway contact
Weather
Visual (VMC) · Day
Status
Completed · report October 6, 2011
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
FEDERAL AVIATION ADMINISTRATION
FAA report
20110716013929A
Case key
81151

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot's failure to maintain directional control on landing. Contributing to the accident was the touch down in a slide-slip.

Findings · 2

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedStearman C2: 1 caseAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotStearman C2: 1 caseAll aircraft: 9,295 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot reported that he was involved in a biplane fly-in that was going on at the time of the accident. According to a Federal Aviation Administration inspector, witnesses observed the airplane in a left side-slip during landing. The airplane subsequently touched down in the side-slip on the left wheel. The pilot applied full right rudder to compensate, then right brake to straighten out the airplane; however, the left landing gear strut collapsed, and the airplane entered into a slow speed ground loop, substantially damaging the lower wing. The pilot stated there were no pre-impact mechanical malfunctions or failures that would have precluded normal flight.

Factual narrative

The pilot reported that he was involved in a bi-wing fly-in that was going on at the time of the accident. According to a Federal Aviation Administration inspector, witnesses observed the pilot enter into a side-slip to the left during landing and the airplane touched down in the side-slip on the left wheel. The pilot stated that the airplane was turning left after touchdown and he applied full right rudder to compensate, then right brake to straighten the airplane out. The airplane subsequently changed direction, the left landing gear strut collapsed, and the airplane entered into a slow speed ground loop. There was substantial damage to the lower wing, damage to the propeller, and the landing gear. The pilot reported no pre-impact mechanical malfunctions or failures that would have precluded normal flight.

Aircraft

Registration
N3440
Reported as
Stearman C3-B
Category
Airplane
Serial number
104
Airframe hours
1,188
Engine
Continental W 670-6N, 220 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Tobin Larry F
Registered owner
Tobin Larry F
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 26, 2011 · 8 hours before
Departed
SFF · Spokane, WA
Destination
SFF · Spokane, WA
Airport
SFF · Felts Field, runway 21L, 3,059 × 50 ft, asphalt

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
69
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
April 27, 2011
Seat
Rear
Flight hours
24,341 total · 118 in this make and model · 24,341 as pilot in command · 31 in the last 90 days · 9 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
126° at 6 knots
Visibility
10 statute miles
Lowest ceiling
6,000 ft broken
Temperature
81 °F, dew point 50 °F
Altimeter
29.77 inHg
Observed at
KSFF

Docket · 4

The files NTSB released with the investigation on August 17, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.6 MB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N3440 · 1

Matched to the same aircraft by N-number and date.